Malicious PDF — malware analysis report

Static analysis result for SHA-256 525830ad1c95bbcc…

MALICIOUS

PDF

37.1 KB Created: 2020-08-27 23:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8beef8382dda73a48b97d0aaa355619 SHA-1: 76fa7750ba942376cc0efe715c9ebb5451ab9e91 SHA-256: 525830ad1c95bbcc4d419ee9a4878e47f68ed04753aa5233431278163f604ec1
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=tachibana+san%252527s+circumstances+with+a+man'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, some of which are to unknown domains. The document body, though partially corrupted, contains the same malicious URL and appears to be a lure, possibly to a phishing or malware download site.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=tachibana+san%252527s+circumstances+with+a+man
    • http://begiga.zendenmissoula.com/uploads/1/3/0/7/130738970/begeginave-pimumurugif-bisimuf-tetasimake.pdf
    • http://files.sevenstarsamerica.org/uploads/1/3/0/8/130814633/8957423.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/10971244901.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5116/files/melitusorep.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3559/files/django_delete_object.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/17797240294.pdf
    • https://cdn.shopify.com/s/files/1/0437/8578/1397/files/minecraft_costumes_skin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55628578329.pdf
    • https://cdn.shopify.com/s/files/1/0434/2792/2076/files/86905091161.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/kalimat_ambigu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/rakijurinupezewedami.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9069/files/subordinate_clause_sheet_ks2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051dd.bin
10e72de74101672abfbdeb21ab82cab7ef9041a8c690f540337141e9db7b0882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51DD 5220 bytes
font_01_sfnt_off00006381.bin
95e32f897fa9be0dc73d81da278f980419d41486615593b4ca9bf4572dc86531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 10684 bytes

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